SPATIOTEMPORAL AGGREGATION CHANGE PATTERN OF PM<sub>2.5</sub> AND O<sub>3</sub> CONCENTRATION IN FUJIAN PROVINCE,CHINA

CHEN Fang; HU Jun; XU Lizhong; HUANG Weilong; GUO Eryang; RAO Qinghua

doi:10.13205/j.hjgc.202407019

Volume 42 Issue 7

Jul. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(7): 171-182

CHEN Fang, HU Jun, XU Lizhong, HUANG Weilong, GUO Eryang, RAO Qinghua. SPATIOTEMPORAL AGGREGATION CHANGE PATTERN OF PM2.5 AND O3 CONCENTRATION IN FUJIAN PROVINCE,CHINA[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(7): 171-182. doi: 10.13205/j.hjgc.202407019

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CHEN Fang, HU Jun, XU Lizhong, HUANG Weilong, GUO Eryang, RAO Qinghua. SPATIOTEMPORAL AGGREGATION CHANGE PATTERN OF PM_2.5 AND O₃ CONCENTRATION IN FUJIAN PROVINCE,CHINA[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(7): 171-182. doi: 10.13205/j.hjgc.202407019

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SPATIOTEMPORAL AGGREGATION CHANGE PATTERN OF PM_2.5 AND O₃ CONCENTRATION IN FUJIAN PROVINCE,CHINA

doi: 10.13205/j.hjgc.202407019

1. Fujian Provincial Key Lab of Coastal Basin Environment (Fujian Polytechnic Normal Univeristy), Fuqing 350300, China;
2. College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou 350007, China

Received Date: 2023-07-31
Available Online: 2024-12-02

Abstract

Abstract

Based on the daily average concentration data of PM_2.5 and O₃ from environmental monitoring stations in Fujian Province from 2017 to 2021, the change characteristics and correlation of PM_2.5 and O₃ concentrations in different time scales were discussed, and the potential spatial correlation of PM_2.5 and O₃ pollution was explored by univariate and bivariate spatial autocorrelation analysis methods. The results showed that the annual average concentrations of PM_2.5 and O₃ in Fujian Province showed an overall downward trend in the past five years, and the trend of annual average concentration change was relatively synchronous. The high monthly average concentration of PM_2.5 appeared in January to February, and November to December, and the low value appeared in June to August. The monthly variation showed a "U" distribution with high points at both ends and a low point in the middle. The high monthly average concentration of O₃ appeared in April to May and September to October, the low value appeared in January and December, and the monthly variation showed a bimodal "M" distribution. The concentrations of PM_2.5 and O₃ were positively correlated from January to October, and negatively correlated from November to December. Under different concentrations of PM_2.5 pollution, the change in O₃ concentration was different. When the concentration of PM_2.5 was less than 45 μg/m³, there was a positive correlation between PM_2.5 and O₃ concentration, while when the concentration of PM_2.5 was more than 45 μg/m³, there was a negative correlation between them. There was a spatial positive autocorrelation between the average annual and seasonal concentrations of PM_2.5 and O₃, the L-L clustering area was located in the northwest, mainly distributed in Longyan, Sanming, and Nanping, and the H-H clustering area was located in the southeast, mainly distributed in Fuzhou, Putian, Xiamen and Zhangzhou. The spatial distribution of the annual and the seasonal average concentration of PM_2.5 and O₃ had obvious clustering and similarity.
- Fujian Province,
- PM_2.5,
- O₃,
- correlation,
- aggregation

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References(42)

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